YORK COLLEGE/CUNY Chemistry 108 Exam 2 | 2022 UPDATE
15 views 0 purchase
Course
CHEMISTRY 108
Institution
York College
YORK COLLEGE/CUNY Chemistry 108 Exam 2
Part I: Multiple Choice (60 pts)
1. What is the molecular mass of Br2?
A) 79.90 amu
B) 79.90 g
C) 159.8 amu
D) 159.8 g
E) 2.65 x 10-22 amu
2. Which one of the following does not represent 1.000 mol of the indicated substance?
A) 6.022 × 1023 C atoms
...
york collegecuny chemistry 108 exam 2 part i multiple choice 60 pts 1 what is the molecular mass of br2 a 7990 amu b 7990 g c 1598 amu d 1598 g e 265 x 10 22 amu 2 which one of the fo
Written for
York College
York College
CHEMISTRY 108
All documents for this subject (2)
Seller
Follow
TestGen
Reviews received
Content preview
YORK COLLEGE/CUNY Chemistry 108 Exam 2
Part I: Multiple Choice (60 pts)
1. What is the molecular mass of Br2?
A) 79.90 amu
B) 79.90 g
C) 159.8 amu
D) 159.8 g
E) 2.65 x 10-22 amu
2. Which one of the following does not represent 1.000 mol of the indicated substance?
A) 6.022 × 1023 C atoms
B) 26.00 g Fe
C) 12.01 g C
D) 65.39 g Zn
E) 6.022 × 1023 Fe atoms
3. Boron obtained from borax deposits in Death Valley consists of two isotopes. They are
boron-10 and boron-11 with atomic masses of 10.013 amu and 11.009 amu,
respectively. The atomic mass of boron is 10.81 amu (see periodic table). Which
isotope of boron is more abundant, boron-10 or boron-11?
A) Cannot be determined from data given
B) Neither, their abundances are the same.
C) Boron-10
D) Boron-11
4. How many C atoms are in 5.50 g of C?
A) 5.01 x 1022 C atoms
B) 3.31 x 1024 C atoms
C) 6.02 x 1023 C atoms
D) 2.76 x 1023 C atoms
E) 5.50 x 1023 C atoms
Page 1
, 5. Calculate the average atomic mass of lithium using the following data:
Isotope Abundance Mass
6
Li 7.5 % 6.0151 amu
7
Li 92.5% 7.0160 aum
A) 6.51 amu
B) 6.02 amu
C) 6.94 amu
D) 7.02 amu
E) 6.50 amu
6. Determine the number of moles of aluminum in 96.7 g of Al.
A) 0.279 mol
B) 3.58 mol
C) 7.43 mol
D) 4.21 mol
E) 6.02 × 1023 mol
7. Calculate the molar mass of Ba(NO3)2.
A) 199.3 g/mol
B) 323.3 g/mol
C) 247.3 g/mol
D) 261.3 g/mol
E) 398.6 g/mol
8. What is the mass of 0.0250 mol of P2O5?
A) 35.5 g
B) 5676 g
C) 0.0250 g
D) 1.51 × 1022 g
E) 3.55 g
9. A compound with an empirical formula of C2H2Br3 has a molar mass of 531.47 g/mol.
What is the molecular formula?
A) C2H2Br3
B) C4H4Br6
C) CHBr
D) C4H4Br3
E) C6H6Br9
Page 2
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller TestGen. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $13.49. You're not tied to anything after your purchase.
